7. M
AINTENANCE
H
I
R
OLLER
- B
ELT
C
ONVEYORS
7.4. I
DLER
R
EPLACEMENT
- H
I
L
IFE
M
ODELS
H
I
R
OLLER
, M
INI
R
OLLER
, L
O
R
OLLER
& H
I
L
IFE
100
P115506 R3
a. Nut retainers on the inside of the trunking hold the nuts and therefore a
wrench is not required on the inside nut. See Figure 7.19.
b. The nut retainers can be held in place by using a self-drilling and -tapping
screws from the outside of the trunking sidewall just above the centerline of
the bearing bolts.
c. A slide-hammer or another type of pulling device may be required to help
pull this assembly. (Use by removing the keeper bolt and large washer in
the end of the stub shaft and then inserting the slide-hammer in the end
threads of the stub shaft.)
Figure 7.19
6. Remove the bottom flat idler through the top of the conveyor. See Figure
• A piece of wood or steel bar may have to be used to push the belt to the
side to allow the idler to be removed out the top.
Figure 7.20
7. Place the new bottom flat idler in the trunking in the same manner.
8. Install the new bearing and stub shaft assembly.
• The bearings and stub shafts should be replaced whenever replacing the
idler.
• The bearing and stub shaft assembly should be replaced as a total unit.